Hobson Nord-Lock Superbolt™ Multi-jackbolt tensioners (MJTs)
A “Superbolt” or “multi-jackbolt tensioner (MJT)” is a direct replacement for hex nuts, covered nuts, bolts, etc. They spin onto your existing bolt or stud and provide a better way to bolt up your joint. They consist of three components, shown to the right.
If you are tightening a nut greater than 1″ in diameter, you may find Superbolts useful, since the torque you need to tighten conventional nuts and bolts exponentially increases as the size increases. Nord-Lock products solve this problem and only require hand/air tools to install or remove any size MJT. They eliminate the need for time consuming and unsafe bolting equipment such as sledgehammers, hydraulic wrenches and stud heaters.
Multi-jackbolt tensioners come in a variety of sizes and configurations. Nord-Lock have many stock items that are available for immediate shipment, with the ability to handle custom jobs quickly. If you are experiencing bolting problems such as leakage, thread galling, unsafe working conditions or are using expensive methods and find it difficult to properly bolt your joint, Nord-Lock bolting technologies are the solution for you.